ATHENS -- A strong earthquake, of 4.6 magnitude, has hit the western Greek island of Kephalonia. No damage has been reported.

The tremor occurred at 9:31 a.m. Saturday at sea, west of the island, 25 kilometres (16 miles) below the sea surface, some 300 kilometres west of the capital Athens, the Institute of Geodynamics at Athens University reports.

Since January 26, Kephalonia has been struck by 2 quakes over 5.0 in magnitude, and hundreds of aftershocks over 3.5, resulting to damage in some 3,000 houses, according to authorities. The island, which was flattened in 1953 by 3 successive earthquakes, culminating in a 7.2 tremor, lies in a very active seismic area.

A 4.6 tremor also struck early Friday morning, following a 4.5 one on Wednesday.